XFX PRO650W won't turn on. Any help is appreciated!

Updated thread. The other one was closed.

Last night, after finishing building my new system, I was configuring the BIOS.
I had to install Windows 7, and my case was resting on its side, so I decided to stand it up to insert the DVD.
Note: My new computer couldn't POST while standing up. It would only POST while resting on its side.

As I was raising it, the computer shut down. The front LED was blinking in some strange funky way, so I dc'ed the PSU and waited to turn it on again. It didn't.  

No smoke, no funky blue lights, no burnt smell.

When connected and turned on (the PSU), there's no MoBo lights, no fans spinning, no PSU fan spinning.
I feared a Short might have happened there.  

I have tried the GPU and HDDs in my old computer.

GPU fan works, but it shows no signal. I might have to redo this procedure, as I was pretty nervous/angry at the moment, and I might have not fit the card completely in the board.
Tried another old GPU I had and it shows signal with no problems. (Dead GPU?   )

HDDs work fine. Data is still there, it is readable and writable with no problems.

Here comes the sad part. I don't have any means to test the other new components.
I fear they might have fried (and 400$+ were burnt as well), but I heard my PSU has Short Circuit Protection and other overvoltage/current emergency procedures and protocols.

Is my PSU really dead? Or is it just circuit-broken due to the SC and I just have to reset it (how?)?.

Is there any chance my other components and my GPU were damaged during this episode?

How do the SCP and over V/C protocols work?

In case this wasn't accidental, but a DOA PSU, does the retailer have any responsibility over my other possibly damaged components?

These items were bought from Newegg like 4-5 months ago. The reason is I live in Bolivia, so I had them brought by a relative just a week ago. Even tho I'm out of RMA time, and this might be considered my fault, are there any procedures for repairing/refunding/replacement that I might follow? 400$+ is pretty steep for a college student here, and losing them in a sec due to a probable mistake, accident or a faulty PSU is pretty harsh. I can have the same relative bring the components to USA again, but I'm wondering how should I proceed to get something back (in case something else is damaged).

I deeply appreciate any help on this subject.

Thank you in advance.